Improvement in screw-wrenches



J. HYDE. WRENGHQ Patented'lllar; 13, 1855 JOSEPH H YDE, OB. NEW YORK, N.Y. IMPROVEMENT INSCREW-WRENGHES.

I v SpecificatioiiformingApart of Letters Patent N0. 12,510, dated Maroh13, 1855.

T0 all whom 7lt may ooncern: extehds through an opening i1i the fr ontedge Be it known that I, JOSEPH HYDE, of oho of the jaw D. city, copnty,and State of New York, have in- Within the lower part of the movable jawventedia n'ow and Improved Wrench; and I D bhere is a cam G, ehe axis c.of said cam (10 herebydeclare that the following is afu1 l, vvorking inthe sides of the jaw. The cam clear, and exact deseription of the same,referhas a spring-lever H at'aehed to it.

enCe being l1ad 130 the annexed drawings, mak- The movable jaw -D, asbefore stated, is ingapart of this specification,in whioha1lowed to movefreely on the shank B, and

Figur 1 is a side view of my improved i's seeured at any desired pointby pressing wrenoh. Fig. 2 is alsoaside view o f the same, the thumb o1finger 011 t]1e lever H, by which th(a1ower 01 movable jawbeing insection and the oam G is made 110 bind againsn the shank showing thegripper 01 auxiliary jaw am]. B. Now if a round piece of iron 01 tubingd Garn. Fig. 3 is a back view of the Same. A (see Fig. l) be plaeedbetween the two jaws Simi1ar letters of referenee indieate corre- A Dand the movable jaw raised or moved sponding parts in t-he sevefalfigures. upward so as nearly to touch the iron d, and

The nature of my invenuion consists in havsecured at that pointbypressing the lefirer H,

@ ing an auxiliary jaw 01" gripper placed in and the auxiliary jaw orgripper E, by presssither of the jaws of the wrench and so couing uponthe projection bbethrownup against structed and arranged, as will beherei'nafter the iron o1 tube d, i will be seen that by turnfully shown,that said auxiliary jaw or griping the wreneh in the usua1 direction, asinper will as the wrench is turned bind firrnly dicated by the bluearrow, Fig. l, the iron or on the artic1e between the jaws, andconsetube d Will be grasped firmly between the j aw quently allowoylindrical as We11 as square 01 A and the jaw 01 gripper E, and thegreatex polygonal shaped artioles-to be grasped firrnly the foroeexerted in turning the wrench 13110 by the jaws. greater Will be theholding force upon the T0 enable others skilled in the art to fully iron01 pipe, because the iron or pip6 as the underst'and and constructmyinvention,1 will wr ench is turned has a tendenoy 130 turn the proeeed110 describe it. jaw or gripper upon it-s trunnions a, as indii Arepresents the upper or stationary jaw oated by the dotted arrow, Fig.1, and conseattaohed to a shank B of 1ectangular form. quently thebinding o1 holding force is in- The lower part or end of the shankis'secured ereased in proportion to the force applied in in a handle O.turning the wreneh.

D is the movable jaw, whioh slides freely The above wrenoh may be usedfor grasp- 0n tho shank B. The jaw may be of any couing square 01'polygonal forms as we11 as round. venient forma, and may be described asbeing 111 is equal1y applicable for both purposes, for hollow or havinga reoess within it extending the auxiliaryjaw or gripper when not inaction from its up1 ertoitslowerpart. Within this does not prevenb thejaws A D from acting recess an auxiliary jaw o1 gripper E is sesimilarlyto an ordinary wrenoh; hence the cured, the lower end of the j aw orgripper imporoanoe 0f the invention. It is equivahaving short trunnionsa 00,- fiting in reoesses 1ent 110 two ordinary tools, for at preseutthere in the jaw D. The upper surface of oho jaw a)re tools constructedfor glasping ro1ind iron or gripper E is corrugated and is flush With ortubing only, ca1led gas-tongs, but differthe upper surface of the jaw,except when ing widely in eonstruction from my improved aoted upon, soas to have its outer end thrown wrench.

upward, as will be hereinafter described. Be- The auxiliary jaw 01gripper E may be coutween the inner side 0f the auxiliary jaw orstruoted of steel properly hardened, so as not gripper E and the shai1kB there is placed a to be liable 130 bruise 0r s1ip.

- spring F, as shown in Fig. 2. This spring If necessary, one side ofthe shank B may i keeps the upper su'rfaoe 0f the jaw or gripper beeorrugated and corresponding corrugaflush vith the upper surfaoe of thejaw D. tions mado on the inner'side of the lower 01- T0. the front 01-outei side of the jaw o1 gripmovable jaw D 011 the side opposite theeam, per E ther'eis attached a projection b, wl 1ioh so that said j awmay be kepo seeure and pre UNITED STATES. PATENT OFFICE- as herein shown01 in an equivalent way, so as t0 bind 01 press the article between itand the stationary jaw With a force proportionate 120 that exerted inturning the wrench, as set forth.

JOSEPH HYDE.

Witnesses:

A J. G. MASON,

J. W. COOMBS.

